Definition

Delirium is a serious disturbance in a person's mental abilities that results in a decreased awareness of one's environment and confused thinking. The onset of delirium is usually sudden, often within hours or a few days.

Delirium can often be traced to one or more contributing factors, such as a severe or chronic medical illness, medication, infection, surgery, or drug or alcohol abuse.

The symptoms of delirium and dementia can be similar, and input from a family member or caregiver may be important for a doctor to make an accurate diagnosis.

Tips and resources for caregivers: Caring for yourself when you are caring for others. Ask Medicare: Information to help you care for others. http://www.medicare.gov/caregivers/caregiver-topics-support.html. Accessed May 24, 2012.

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